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[Xen-devel,v3,for-next,2/4] xen/arm32: mm: Rework is_xen_heap_page to avoid nameclash

Message ID 20171101140316.31333-3-julien.grall@linaro.org
State Accepted
Commit c6c2fc6e4919a1420096b94a4ba8682f20e92709
Headers show
Series xen: Convert __page_to_mfn and _mfn_to_page to use typesafe MFN | expand

Commit Message

Julien Grall Nov. 1, 2017, 2:03 p.m. UTC
The arm32 version of the function is_xen_heap_page currently define a
variable _mfn. This will lead to a compiler when use typesafe MFN in a
follow-up patch:

called object '_mfn' is not a function or function pointer

Fix it by renaming the local variable _mfn to mfn_.

Signed-off-by: Julien Grall <julien.grall@linaro.org>

---

Cc: Stefano Stabellini <sstabellini@kernel.org>

    Changes in v3:
        - Fix typo in the commit message
---
 xen/include/asm-arm/mm.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Stefano Stabellini Dec. 11, 2017, 11:25 p.m. UTC | #1
On Wed, 1 Nov 2017, Julien Grall wrote:
> The arm32 version of the function is_xen_heap_page currently define a
> variable _mfn. This will lead to a compiler when use typesafe MFN in a
> follow-up patch:
> 
> called object '_mfn' is not a function or function pointer
> 
> Fix it by renaming the local variable _mfn to mfn_.
> 
> Signed-off-by: Julien Grall <julien.grall@linaro.org>

Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>


> ---
> 
> Cc: Stefano Stabellini <sstabellini@kernel.org>
> 
>     Changes in v3:
>         - Fix typo in the commit message
> ---
>  xen/include/asm-arm/mm.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
> index cd6dfb54b9..737a429409 100644
> --- a/xen/include/asm-arm/mm.h
> +++ b/xen/include/asm-arm/mm.h
> @@ -140,9 +140,9 @@ extern vaddr_t xenheap_virt_start;
>  #ifdef CONFIG_ARM_32
>  #define is_xen_heap_page(page) is_xen_heap_mfn(page_to_mfn(page))
>  #define is_xen_heap_mfn(mfn) ({                                 \
> -    unsigned long _mfn = (mfn);                                 \
> -    (_mfn >= mfn_x(xenheap_mfn_start) &&                        \
> -     _mfn < mfn_x(xenheap_mfn_end));                            \
> +    unsigned long mfn_ = (mfn);                                 \
> +    (mfn_ >= mfn_x(xenheap_mfn_start) &&                        \
> +     mfn_ < mfn_x(xenheap_mfn_end));                            \
>  })
>  #else
>  #define is_xen_heap_page(page) ((page)->count_info & PGC_xen_heap)
> -- 
> 2.11.0
>
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Patch

diff --git a/xen/include/asm-arm/mm.h b/xen/include/asm-arm/mm.h
index cd6dfb54b9..737a429409 100644
--- a/xen/include/asm-arm/mm.h
+++ b/xen/include/asm-arm/mm.h
@@ -140,9 +140,9 @@  extern vaddr_t xenheap_virt_start;
 #ifdef CONFIG_ARM_32
 #define is_xen_heap_page(page) is_xen_heap_mfn(page_to_mfn(page))
 #define is_xen_heap_mfn(mfn) ({                                 \
-    unsigned long _mfn = (mfn);                                 \
-    (_mfn >= mfn_x(xenheap_mfn_start) &&                        \
-     _mfn < mfn_x(xenheap_mfn_end));                            \
+    unsigned long mfn_ = (mfn);                                 \
+    (mfn_ >= mfn_x(xenheap_mfn_start) &&                        \
+     mfn_ < mfn_x(xenheap_mfn_end));                            \
 })
 #else
 #define is_xen_heap_page(page) ((page)->count_info & PGC_xen_heap)